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Where is L26500 Emergency .plt firmware

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HP DesignJet L26500
Microsoft Windows 10 (64-bit)

Hello. I have 2 HP DesignJet L26500 that are giving me generic error 79:04. Got new hard drives for them and still receiving error. I read in the manual i could force a firmware update with an emergency .plt but the link provided in the manual does not direct me to downloadble .plt. I can only download latest firmware .fmw file.  Where can I download .plt for L26500 DesignJet? Im running out of ideas for fixing the machines. Thank you in advance.

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I have 08.11 error so I was also thinking to update firmware. I real manual and it says upload .plt file but can not get .plt firmware. Hp giving .fmw file.

I can not get IP address as well. What to do????

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